code: def default_onnx_opset(self) -> int:
      return 13
  
file_path: transformers/src/transformers/models/gpt_neo/configuration_gpt_neo.py
imports: from collections import OrderedDict
  from typing import Any, Mapping, Optional
  from ...None import PreTrainedTokenizer, TensorType, is_torch_available
  from ...configuration_utils import PretrainedConfig
  from ...onnx import OnnxConfigWithPast
  from ...utils import logging
label_desc: Use image node_id 4 for calling the GPTNeoOnnxConfig obj's underlying member method code with example usage: obj.default_onnx_opset() and returns: int